Newegg has the Seagate Momentus XT 500GB 2.5" SATA Solid State Hybrid Hard Drive (ST95005620AS) for a low $49.99 Free Shipping after Coupon Code: "EMCJJJF84" (Exp 11/21). Tax in CA, NJ, TN. This is 24% less than the next best price from a reputable merchant.

This features 4GB of NAND storage. The adaptive memory customizes performance by utilizing the flash NAND for frequently accessed portions of the hard drive.